MOSCOW, December 09. /ITAR-TASS/. Russian Federal Agency of Air Transport, Rosaviation, has recommended checks of all Boeings-737s that are used by Russia’s airlines. The measure is part of the investigation into the last month’s crash of a Boeing-737 in the Russian city of Kazan.

In order to ensure flight safety, Rosaviation suggests all Boeings be checked for compliance with airworthiness directives issued by the manufacturer as an addendum to the aircraft maintenance manuals (···), Rosaviation’s head Alexander Neradko said in a letter to all territorial branches of Rosaviation and air carriers. The results are to be presented to Rosaviation’s air worthiness department by December 12, 2013.

Rosaviation also proposes thorough checks of the elevator power control units for the presence of what air specialists call “foreign objects” and dirt and to verify “the smoothness of the elevating rudder’s operation. The findings are to be presented to the air worthiness department by December 15, 2013.

‘Tatarstan airlines’ ·-737-500 jet (registration number VQ-BBN, serial number 24785) that crashed November 17 in Kazan was registered in the Bermudas on December 19, 2008. It was manufactured in July 1990. From the moment it had started flying and till the crash the plane spent 51,547 hours in flight and made 36,595 takeoffs and landings.